Based on the the Lutheran Book of Worship Three-year Lectionary (for public Worship), "Prayers of the Day..." (Propers).* It is based, with only minor variations, on the Revised Common Lectionary, used by many denominations, including the Episcopal, Lutheran, Presbyterian and Methodist Churches.
RCL: http://www. commontexts.org/ and http://www.commontexts.org/rcl/usage.html
The daily readings are the Propers (Lections) for the following Sunday, so that the daily devotions can prepare us for worship. Additional Lections are from the Common Service Book of the Lutheran Church, "Scripture Lessons for Matins and Vespers, A,**